Now comes a new study suggesting a link between fluoride exposure in pregnancy and lower IQs in children. The study recruited pregnant women from 1994 to 2005, and has followed the women and their children since. Children scored 2.5 to three points lower on IQ tests for every 0.5 milligram-per-litre increase in their mother’s urinary fluoride levels beyond 0.8 mg/L. As well, the children’s own urinary fluoride levels, measured when they were being tested, didn’t seem to have a significant effect. In Canada and the U.S., most fluoride exposure comes from the fluoridation of drinking water to prevent cavities, and fluoride in toothpaste and other dental products.

Source: National Post September 21, 2017 02:37 UTC